Which measure of variability is most general and,hence,least useful?

A) median
B) range
C) standard deviation
D) mean deviation

Variability

The degree to which observations in a dataset or statistical distribution vary from the mean and among themselves.

Range

The difference between the highest and lowest scores in a data set, reflecting the spread or dispersion of the scores.

Mean Deviation

The average of absolute differences between each value in a set and the mean of the set, indicating the dataset's dispersion.